When it comes to watching the latest TV shows online. Hulu has become the number 1 destination and already broadcasts content from over 130 TV networks. However the big glaring omissions are still ABC and CBS.

The reasons behind this are a little frail. For instance ABC say that they only distribute TV content to websites that accept its proprietary video player from Move Networks. Video sites such as Veoh and AOL do this. And CBS’s reason? Well noone knows, but they may be trying to compete with Hulu using its own newly aquired TV portal, TV.com, although the content on this site thus far is hardly getting anyones TV juices flowing.

ABC may not be broadcasting on Hulu but its happy to run advertising on the NBC/News Corp joint site. Broadcasting & Cable’s Alex Welprin noticed that ABC is running promo ads on Hulu shows for its sitcom “Better Off Ted,” including the option of watching a full trailer of the show, in exchange for getting “King of the Hill” commercial free.

Interestingly if a Hulu viewer does a search for any ABC TV show, such as “Desperate Houseweives,” Hulu links to ABC.com’s player anyway. Therefore ABC must be aware of how much traffic Hulu is sending its way and how many Hulu users are looking for ABC content on Hulu. As ABC obviously rate Hulu’s traffic big enough to advertise on it, surely the next logical step would be to distribute its TV shows directly through Hulu’s website.

If that were to happen. CBS would not surely be far behind.

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